More stuff for new TLS ciphersuites.
[openssl.git] / ssl / s3_lib.c
1 /* ssl/s3_lib.c */
2 /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
3  * All rights reserved.
4  *
5  * This package is an SSL implementation written
6  * by Eric Young (eay@cryptsoft.com).
7  * The implementation was written so as to conform with Netscapes SSL.
8  * 
9  * This library is free for commercial and non-commercial use as long as
10  * the following conditions are aheared to.  The following conditions
11  * apply to all code found in this distribution, be it the RC4, RSA,
12  * lhash, DES, etc., code; not just the SSL code.  The SSL documentation
13  * included with this distribution is covered by the same copyright terms
14  * except that the holder is Tim Hudson (tjh@cryptsoft.com).
15  * 
16  * Copyright remains Eric Young's, and as such any Copyright notices in
17  * the code are not to be removed.
18  * If this package is used in a product, Eric Young should be given attribution
19  * as the author of the parts of the library used.
20  * This can be in the form of a textual message at program startup or
21  * in documentation (online or textual) provided with the package.
22  * 
23  * Redistribution and use in source and binary forms, with or without
24  * modification, are permitted provided that the following conditions
25  * are met:
26  * 1. Redistributions of source code must retain the copyright
27  *    notice, this list of conditions and the following disclaimer.
28  * 2. Redistributions in binary form must reproduce the above copyright
29  *    notice, this list of conditions and the following disclaimer in the
30  *    documentation and/or other materials provided with the distribution.
31  * 3. All advertising materials mentioning features or use of this software
32  *    must display the following acknowledgement:
33  *    "This product includes cryptographic software written by
34  *     Eric Young (eay@cryptsoft.com)"
35  *    The word 'cryptographic' can be left out if the rouines from the library
36  *    being used are not cryptographic related :-).
37  * 4. If you include any Windows specific code (or a derivative thereof) from 
38  *    the apps directory (application code) you must include an acknowledgement:
39  *    "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
40  * 
41  * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
42  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
43  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
44  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
45  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
46  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
47  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
48  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
49  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
50  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
51  * SUCH DAMAGE.
52  * 
53  * The licence and distribution terms for any publically available version or
54  * derivative of this code cannot be changed.  i.e. this code cannot simply be
55  * copied and put under another distribution licence
56  * [including the GNU Public Licence.]
57  */
58
59 #include <stdio.h>
60 #include "objects.h"
61 #include "ssl_locl.h"
62
63 char *ssl3_version_str="SSLv3 part of OpenSSL 0.9.2 31-Dec-1998";
64
65 #define SSL3_NUM_CIPHERS        (sizeof(ssl3_ciphers)/sizeof(SSL_CIPHER))
66
67 #ifndef NOPROTO
68 static long ssl3_default_timeout(void );
69 #else
70 static long ssl3_default_timeout();
71 #endif
72
73 SSL_CIPHER ssl3_ciphers[]={
74 /* The RSA ciphers */
75 /* Cipher 01 */
76         {
77         1,
78         SSL3_TXT_RSA_NULL_MD5,
79         SSL3_CK_RSA_NULL_MD5,
80         SSL_kRSA|SSL_aRSA|SSL_eNULL |SSL_MD5|SSL_NOT_EXP|SSL_SSLV3,
81         0,
82         SSL_ALL_CIPHERS,
83         },
84 /* Cipher 02 */
85         {
86         1,
87         SSL3_TXT_RSA_NULL_SHA,
88         SSL3_CK_RSA_NULL_SHA,
89         SSL_kRSA|SSL_aRSA|SSL_eNULL |SSL_SHA1|SSL_NOT_EXP|SSL_SSLV3,
90         0,
91         SSL_ALL_CIPHERS,
92         },
93
94 /* anon DH */
95 /* Cipher 17 */
96         {
97         1,
98         SSL3_TXT_ADH_RC4_40_MD5,
99         SSL3_CK_ADH_RC4_40_MD5,
100         SSL_kEDH |SSL_aNULL|SSL_RC4  |SSL_MD5 |SSL_EXP40|SSL_SSLV3,
101         0,
102         SSL_ALL_CIPHERS,
103         },
104 /* Cipher 18 */
105         {
106         1,
107         SSL3_TXT_ADH_RC4_128_MD5,
108         SSL3_CK_ADH_RC4_128_MD5,
109         SSL_kEDH |SSL_aNULL|SSL_RC4  |SSL_MD5|SSL_NOT_EXP|SSL_SSLV3,
110         0,
111         SSL_ALL_CIPHERS,
112         },
113 /* Cipher 19 */
114         {
115         1,
116         SSL3_TXT_ADH_DES_40_CBC_SHA,
117         SSL3_CK_ADH_DES_40_CBC_SHA,
118         SSL_kEDH |SSL_aNULL|SSL_DES|SSL_SHA1|SSL_EXP40|SSL_SSLV3,
119         0,
120         SSL_ALL_CIPHERS,
121         },
122 /* Cipher 1A */
123         {
124         1,
125         SSL3_TXT_ADH_DES_64_CBC_SHA,
126         SSL3_CK_ADH_DES_64_CBC_SHA,
127         SSL_kEDH |SSL_aNULL|SSL_DES  |SSL_SHA1|SSL_NOT_EXP|SSL_SSLV3,
128         0,
129         SSL_ALL_CIPHERS,
130         },
131 /* Cipher 1B */
132         {
133         1,
134         SSL3_TXT_ADH_DES_192_CBC_SHA,
135         SSL3_CK_ADH_DES_192_CBC_SHA,
136         SSL_kEDH |SSL_aNULL|SSL_3DES |SSL_SHA1|SSL_NOT_EXP|SSL_SSLV3,
137         0,
138         SSL_ALL_CIPHERS,
139         },
140
141 /* RSA again */
142 /* Cipher 03 */
143         {
144         1,
145         SSL3_TXT_RSA_RC4_40_MD5,
146         SSL3_CK_RSA_RC4_40_MD5,
147         SSL_kRSA|SSL_aRSA|SSL_RC4  |SSL_MD5 |SSL_EXP40|SSL_SSLV3,
148         0,
149         SSL_ALL_CIPHERS,
150         },
151 /* Cipher 04 */
152         {
153         1,
154         SSL3_TXT_RSA_RC4_128_MD5,
155         SSL3_CK_RSA_RC4_128_MD5,
156         SSL_kRSA|SSL_aRSA|SSL_RC4  |SSL_MD5|SSL_NOT_EXP|SSL_SSLV3|SSL_MEDIUM,
157         0,
158         SSL_ALL_CIPHERS,
159         },
160 /* Cipher 05 */
161         {
162         1,
163         SSL3_TXT_RSA_RC4_128_SHA,
164         SSL3_CK_RSA_RC4_128_SHA,
165         SSL_kRSA|SSL_aRSA|SSL_RC4  |SSL_SHA1|SSL_NOT_EXP|SSL_SSLV3|SSL_MEDIUM,
166         0,
167         SSL_ALL_CIPHERS,
168         },
169 /* Cipher 06 */
170         {
171         1,
172         SSL3_TXT_RSA_RC2_40_MD5,
173         SSL3_CK_RSA_RC2_40_MD5,
174         SSL_kRSA|SSL_aRSA|SSL_RC2  |SSL_MD5 |SSL_EXP40|SSL_SSLV3,
175         0,
176         SSL_ALL_CIPHERS,
177         },
178 /* Cipher 07 */
179         {
180         1,
181         SSL3_TXT_RSA_IDEA_128_SHA,
182         SSL3_CK_RSA_IDEA_128_SHA,
183         SSL_kRSA|SSL_aRSA|SSL_IDEA |SSL_SHA1|SSL_NOT_EXP|SSL_SSLV3|SSL_MEDIUM,
184         0,
185         SSL_ALL_CIPHERS,
186         },
187 /* Cipher 08 */
188         {
189         1,
190         SSL3_TXT_RSA_DES_40_CBC_SHA,
191         SSL3_CK_RSA_DES_40_CBC_SHA,
192         SSL_kRSA|SSL_aRSA|SSL_DES|SSL_SHA1|SSL_EXP40|SSL_SSLV3,
193         0,
194         SSL_ALL_CIPHERS,
195         },
196 /* Cipher 09 */
197         {
198         1,
199         SSL3_TXT_RSA_DES_64_CBC_SHA,
200         SSL3_CK_RSA_DES_64_CBC_SHA,
201         SSL_kRSA|SSL_aRSA|SSL_DES  |SSL_SHA1|SSL_NOT_EXP|SSL_SSLV3|SSL_LOW,
202         0,
203         SSL_ALL_CIPHERS,
204         },
205 /* Cipher 0A */
206         {
207         1,
208         SSL3_TXT_RSA_DES_192_CBC3_SHA,
209         SSL3_CK_RSA_DES_192_CBC3_SHA,
210         SSL_kRSA|SSL_aRSA|SSL_3DES |SSL_SHA1|SSL_NOT_EXP|SSL_SSLV3|SSL_HIGH,
211         0,
212         SSL_ALL_CIPHERS,
213         },
214
215 /*  The DH ciphers */
216 /* Cipher 0B */
217         {
218         0,
219         SSL3_TXT_DH_DSS_DES_40_CBC_SHA,
220         SSL3_CK_DH_DSS_DES_40_CBC_SHA,
221         SSL_kDHd |SSL_aDH|SSL_DES|SSL_SHA1|SSL_EXP40|SSL_SSLV3,
222         0,
223         SSL_ALL_CIPHERS,
224         },
225 /* Cipher 0C */
226         {
227         0,
228         SSL3_TXT_DH_DSS_DES_64_CBC_SHA,
229         SSL3_CK_DH_DSS_DES_64_CBC_SHA,
230         SSL_kDHd |SSL_aDH|SSL_DES  |SSL_SHA1|SSL_NOT_EXP|SSL_SSLV3|SSL_LOW,
231         0,
232         SSL_ALL_CIPHERS,
233         },
234 /* Cipher 0D */
235         {
236         0,
237         SSL3_TXT_DH_DSS_DES_192_CBC3_SHA,
238         SSL3_CK_DH_DSS_DES_192_CBC3_SHA,
239         SSL_kDHd |SSL_aDH|SSL_3DES |SSL_SHA1|SSL_NOT_EXP|SSL_SSLV3|SSL_HIGH,
240         0,
241         SSL_ALL_CIPHERS,
242         },
243 /* Cipher 0E */
244         {
245         0,
246         SSL3_TXT_DH_RSA_DES_40_CBC_SHA,
247         SSL3_CK_DH_RSA_DES_40_CBC_SHA,
248         SSL_kDHr |SSL_aDH|SSL_DES|SSL_SHA1|SSL_EXP40|SSL_SSLV3,
249         0,
250         SSL_ALL_CIPHERS,
251         },
252 /* Cipher 0F */
253         {
254         0,
255         SSL3_TXT_DH_RSA_DES_64_CBC_SHA,
256         SSL3_CK_DH_RSA_DES_64_CBC_SHA,
257         SSL_kDHr |SSL_aDH|SSL_DES  |SSL_SHA1|SSL_NOT_EXP|SSL_SSLV3|SSL_LOW,
258         0,
259         SSL_ALL_CIPHERS,
260         },
261 /* Cipher 10 */
262         {
263         0,
264         SSL3_TXT_DH_RSA_DES_192_CBC3_SHA,
265         SSL3_CK_DH_RSA_DES_192_CBC3_SHA,
266         SSL_kDHr |SSL_aDH|SSL_3DES |SSL_SHA1|SSL_NOT_EXP|SSL_SSLV3|SSL_HIGH,
267         0,
268         SSL_ALL_CIPHERS,
269         },
270
271 /* The Ephemeral DH ciphers */
272 /* Cipher 11 */
273         {
274         1,
275         SSL3_TXT_EDH_DSS_DES_40_CBC_SHA,
276         SSL3_CK_EDH_DSS_DES_40_CBC_SHA,
277         SSL_kEDH|SSL_aDSS|SSL_DES|SSL_SHA1|SSL_EXP40|SSL_SSLV3,
278         0,
279         SSL_ALL_CIPHERS,
280         },
281 /* Cipher 12 */
282         {
283         1,
284         SSL3_TXT_EDH_DSS_DES_64_CBC_SHA,
285         SSL3_CK_EDH_DSS_DES_64_CBC_SHA,
286         SSL_kEDH|SSL_aDSS|SSL_DES  |SSL_SHA1|SSL_NOT_EXP|SSL_SSLV3|SSL_LOW,
287         0,
288         SSL_ALL_CIPHERS,
289         },
290 /* Cipher 13 */
291         {
292         1,
293         SSL3_TXT_EDH_DSS_DES_192_CBC3_SHA,
294         SSL3_CK_EDH_DSS_DES_192_CBC3_SHA,
295         SSL_kEDH|SSL_aDSS|SSL_3DES |SSL_SHA1|SSL_NOT_EXP|SSL_SSLV3|SSL_HIGH,
296         0,
297         SSL_ALL_CIPHERS,
298         },
299 /* Cipher 14 */
300         {
301         1,
302         SSL3_TXT_EDH_RSA_DES_40_CBC_SHA,
303         SSL3_CK_EDH_RSA_DES_40_CBC_SHA,
304         SSL_kEDH|SSL_aRSA|SSL_DES|SSL_SHA1|SSL_EXP40|SSL_SSLV3,
305         0,
306         SSL_ALL_CIPHERS,
307         },
308 /* Cipher 15 */
309         {
310         1,
311         SSL3_TXT_EDH_RSA_DES_64_CBC_SHA,
312         SSL3_CK_EDH_RSA_DES_64_CBC_SHA,
313         SSL_kEDH|SSL_aRSA|SSL_DES  |SSL_SHA1|SSL_NOT_EXP|SSL_SSLV3|SSL_LOW,
314         0,
315         SSL_ALL_CIPHERS,
316         },
317 /* Cipher 16 */
318         {
319         1,
320         SSL3_TXT_EDH_RSA_DES_192_CBC3_SHA,
321         SSL3_CK_EDH_RSA_DES_192_CBC3_SHA,
322         SSL_kEDH|SSL_aRSA|SSL_3DES |SSL_SHA1|SSL_NOT_EXP|SSL_SSLV3|SSL_HIGH,
323         0,
324         SSL_ALL_CIPHERS,
325         },
326
327 /* Fortezza */
328 /* Cipher 1C */
329         {
330         0,
331         SSL3_TXT_FZA_DMS_NULL_SHA,
332         SSL3_CK_FZA_DMS_NULL_SHA,
333         SSL_kFZA|SSL_aFZA |SSL_eNULL |SSL_SHA1|SSL_NOT_EXP|SSL_SSLV3,
334         0,
335         SSL_ALL_CIPHERS,
336         },
337
338 /* Cipher 1D */
339         {
340         0,
341         SSL3_TXT_FZA_DMS_FZA_SHA,
342         SSL3_CK_FZA_DMS_FZA_SHA,
343         SSL_kFZA|SSL_aFZA |SSL_eFZA |SSL_SHA1|SSL_NOT_EXP|SSL_SSLV3,
344         0,
345         SSL_ALL_CIPHERS,
346         },
347
348 /* Cipher 1E */
349         {
350         0,
351         SSL3_TXT_FZA_DMS_RC4_SHA,
352         SSL3_CK_FZA_DMS_RC4_SHA,
353         SSL_kFZA|SSL_aFZA |SSL_RC4  |SSL_SHA1|SSL_NOT_EXP|SSL_SSLV3,
354         0,
355         SSL_ALL_CIPHERS,
356         },
357
358         /* New TLS Export CipherSuites */
359         /* Cipher 60 */
360             {
361             1,
362             TLS1_TXT_RSA_EXPORT56_WITH_RC4_56_MD5,
363             TLS1_CK_RSA_EXPORT56_WITH_RC4_56_MD5,
364             SSL_kRSA|SSL_aRSA|SSL_RC4|SSL_MD5|SSL_EXP56|SSL_TLSV1,
365             0,
366             SSL_ALL_CIPHERS
367             },
368         /* Cipher 61 */
369             {
370             1,
371             TLS1_TXT_RSA_EXPORT56_WITH_RC2_CBC_56_MD5,
372             TLS1_CK_RSA_EXPORT56_WITH_RC2_CBC_56_MD5,
373             SSL_kRSA|SSL_aRSA|SSL_RC2|SSL_MD5|SSL_EXP56|SSL_TLSV1,
374             0,
375             SSL_ALL_CIPHERS
376             },
377         /* Cipher 62 */
378             {
379             1,
380             TLS1_TXT_RSA_EXPORT56_WITH_DES_CBC_SHA,
381             TLS1_CK_RSA_EXPORT56_WITH_DES_CBC_SHA,
382             SSL_kRSA|SSL_aRSA|SSL_DES|SSL_SHA|SSL_EXP56|SSL_TLSV1,
383             0,
384             SSL_ALL_CIPHERS
385             },
386
387 /* end of list */
388         };
389
390 static SSL3_ENC_METHOD SSLv3_enc_data={
391         ssl3_enc,
392         ssl3_mac,
393         ssl3_setup_key_block,
394         ssl3_generate_master_secret,
395         ssl3_change_cipher_state,
396         ssl3_final_finish_mac,
397         MD5_DIGEST_LENGTH+SHA_DIGEST_LENGTH,
398         ssl3_cert_verify_mac,
399         SSL3_MD_CLIENT_FINISHED_CONST,4,
400         SSL3_MD_SERVER_FINISHED_CONST,4,
401         ssl3_alert_code,
402         };
403
404 static SSL_METHOD SSLv3_data= {
405         SSL3_VERSION,
406         ssl3_new,
407         ssl3_clear,
408         ssl3_free,
409         ssl_undefined_function,
410         ssl_undefined_function,
411         ssl3_read,
412         ssl3_peek,
413         ssl3_write,
414         ssl3_shutdown,
415         ssl3_renegotiate,
416         ssl3_renegotiate_check,
417         ssl3_ctrl,
418         ssl3_ctx_ctrl,
419         ssl3_get_cipher_by_char,
420         ssl3_put_cipher_by_char,
421         ssl3_pending,
422         ssl3_num_ciphers,
423         ssl3_get_cipher,
424         ssl_bad_method,
425         ssl3_default_timeout,
426         &SSLv3_enc_data,
427         };
428
429 static long ssl3_default_timeout()
430         {
431         /* 2 hours, the 24 hours mentioned in the SSLv3 spec
432          * is way too long for http, the cache would over fill */
433         return(60*60*2);
434         }
435
436 SSL_METHOD *sslv3_base_method()
437         {
438         return(&SSLv3_data);
439         }
440
441 int ssl3_num_ciphers()
442         {
443         return(SSL3_NUM_CIPHERS);
444         }
445
446 SSL_CIPHER *ssl3_get_cipher(u)
447 unsigned int u;
448         {
449         if (u < SSL3_NUM_CIPHERS)
450                 return(&(ssl3_ciphers[SSL3_NUM_CIPHERS-1-u]));
451         else
452                 return(NULL);
453         }
454
455 /* The problem is that it may not be the correct record type */
456 int ssl3_pending(s)
457 SSL *s;
458         {
459         return(s->s3->rrec.length);
460         }
461
462 int ssl3_new(s)
463 SSL *s;
464         {
465         SSL3_CTX *s3;
466
467         if ((s3=(SSL3_CTX *)Malloc(sizeof(SSL3_CTX))) == NULL) goto err;
468         memset(s3,0,sizeof(SSL3_CTX));
469
470         s->s3=s3;
471         /*
472         s->s3->tmp.ca_names=NULL;
473         s->s3->tmp.key_block=NULL;
474         s->s3->tmp.key_block_length=0;
475         s->s3->rbuf.buf=NULL;
476         s->s3->wbuf.buf=NULL;
477         */
478
479         s->method->ssl_clear(s);
480         return(1);
481 err:
482         return(0);
483         }
484
485 void ssl3_free(s)
486 SSL *s;
487         {
488         if(s == NULL)
489             return;
490
491         ssl3_cleanup_key_block(s);
492         if (s->s3->rbuf.buf != NULL)
493                 Free(s->s3->rbuf.buf);
494         if (s->s3->wbuf.buf != NULL)
495                 Free(s->s3->wbuf.buf);
496         if (s->s3->rrec.comp != NULL)
497                 Free(s->s3->rrec.comp);
498 #ifndef NO_DH
499         if (s->s3->tmp.dh != NULL)
500                 DH_free(s->s3->tmp.dh);
501 #endif
502         if (s->s3->tmp.ca_names != NULL)
503                 sk_pop_free(s->s3->tmp.ca_names,X509_NAME_free);
504         memset(s->s3,0,sizeof(SSL3_CTX));
505         Free(s->s3);
506         s->s3=NULL;
507         }
508
509 void ssl3_clear(s)
510 SSL *s;
511         {
512         unsigned char *rp,*wp;
513
514         ssl3_cleanup_key_block(s);
515         if (s->s3->tmp.ca_names != NULL)
516                 sk_pop_free(s->s3->tmp.ca_names,X509_NAME_free);
517
518         if (s->s3->rrec.comp != NULL)
519                 {
520                 Free(s->s3->rrec.comp);
521                 s->s3->rrec.comp=NULL;
522                 }
523
524         rp=s->s3->rbuf.buf;
525         wp=s->s3->wbuf.buf;
526
527         memset(s->s3,0,sizeof(SSL3_CTX));
528         if (rp != NULL) s->s3->rbuf.buf=rp;
529         if (wp != NULL) s->s3->wbuf.buf=wp;
530
531         ssl_free_wbio_buffer(s);
532
533         s->packet_length=0;
534         s->s3->renegotiate=0;
535         s->s3->total_renegotiations=0;
536         s->s3->num_renegotiations=0;
537         s->s3->in_read_app_data=0;
538         s->version=SSL3_VERSION;
539         }
540
541 long ssl3_ctrl(s,cmd,larg,parg)
542 SSL *s;
543 int cmd;
544 long larg;
545 char *parg;
546         {
547         int ret=0;
548
549         switch (cmd)
550                 {
551         case SSL_CTRL_GET_SESSION_REUSED:
552                 ret=s->hit;
553                 break;
554         case SSL_CTRL_GET_CLIENT_CERT_REQUEST:
555                 break;
556         case SSL_CTRL_GET_NUM_RENEGOTIATIONS:
557                 ret=s->s3->num_renegotiations;
558                 break;
559         case SSL_CTRL_CLEAR_NUM_RENEGOTIATIONS:
560                 ret=s->s3->num_renegotiations;
561                 s->s3->num_renegotiations=0;
562                 break;
563         case SSL_CTRL_GET_TOTAL_RENEGOTIATIONS:
564                 ret=s->s3->total_renegotiations;
565                 break;
566         case SSL_CTRL_GET_FLAGS:
567                 ret=(int)(s->s3->flags);
568                 break;
569         default:
570                 break;
571                 }
572         return(ret);
573         }
574
575 long ssl3_ctx_ctrl(ctx,cmd,larg,parg)
576 SSL_CTX *ctx;
577 int cmd;
578 long larg;
579 char *parg;
580         {
581         CERT *cert;
582
583         cert=ctx->default_cert;
584
585         switch (cmd)
586                 {
587 #ifndef NO_RSA
588         case SSL_CTRL_NEED_TMP_RSA:
589                 if (    (cert->rsa_tmp == NULL) &&
590                         ((cert->pkeys[SSL_PKEY_RSA_ENC].privatekey == NULL) ||
591                          (EVP_PKEY_size(cert->pkeys[SSL_PKEY_RSA_ENC].privatekey) > (512/8)))
592                         )
593                         return(1);
594                 else
595                         return(0);
596                 /* break; */
597         case SSL_CTRL_SET_TMP_RSA:
598                 {
599                 RSA *rsa;
600                 int i;
601
602                 rsa=(RSA *)parg;
603                 i=1;
604                 if (rsa == NULL)
605                         i=0;
606                 else
607                         {
608                         if ((rsa=RSAPrivateKey_dup(rsa)) == NULL)
609                                 i=0;
610                         }
611                 if (!i)
612                         {
613                         SSLerr(SSL_F_SSL3_CTX_CTRL,ERR_R_RSA_LIB);
614                         return(0);
615                         }
616                 else
617                         {
618                         if (cert->rsa_tmp != NULL)
619                                 RSA_free(cert->rsa_tmp);
620                         cert->rsa_tmp=rsa;
621                         return(1);
622                         }
623                 }
624                 /* break; */
625         case SSL_CTRL_SET_TMP_RSA_CB:
626                 cert->rsa_tmp_cb=(RSA *(*)())parg;
627                 break;
628 #endif
629 #ifndef NO_DH
630         case SSL_CTRL_SET_TMP_DH:
631                 {
632                 DH *new=NULL,*dh;
633                 int rret=0;
634
635                 dh=(DH *)parg;
636                 if (    ((new=DHparams_dup(dh)) == NULL) ||
637                         (!DH_generate_key(new)))
638                         {
639                         SSLerr(SSL_F_SSL3_CTX_CTRL,ERR_R_DH_LIB);
640                         if (new != NULL) DH_free(new);
641                         }
642                 else
643                         {
644                         if (cert->dh_tmp != NULL)
645                                 DH_free(cert->dh_tmp);
646                         cert->dh_tmp=new;
647                         rret=1;
648                         }
649                 return(rret);
650                 }
651                 /*break; */
652         case SSL_CTRL_SET_TMP_DH_CB:
653                 cert->dh_tmp_cb=(DH *(*)())parg;
654                 break;
655 #endif
656         /* A Thawte special :-) */
657         case SSL_CTRL_EXTRA_CHAIN_CERT:
658                 if (ctx->extra_certs == NULL)
659                         {
660                         if ((ctx->extra_certs=sk_new_null()) == NULL)
661                                 return(0);
662                         }
663                 sk_push(ctx->extra_certs,(char *)parg);
664                 break;
665
666         default:
667                 return(0);
668                 }
669         return(1);
670         }
671
672 /* This function needs to check if the ciphers required are actually
673  * available */
674 SSL_CIPHER *ssl3_get_cipher_by_char(p)
675 const unsigned char *p;
676         {
677         static int init=1;
678         static SSL_CIPHER *sorted[SSL3_NUM_CIPHERS];
679         SSL_CIPHER c,*cp= &c,**cpp;
680         unsigned long id;
681         int i;
682
683         if (init)
684                 {
685                 init=0;
686
687                 for (i=0; i<SSL3_NUM_CIPHERS; i++)
688                         sorted[i]= &(ssl3_ciphers[i]);
689
690                 qsort(  (char *)sorted,
691                         SSL3_NUM_CIPHERS,sizeof(SSL_CIPHER *),
692                         FP_ICC ssl_cipher_ptr_id_cmp);
693                 }
694
695         id=0x03000000L|((unsigned long)p[0]<<8L)|(unsigned long)p[1];
696         c.id=id;
697         cpp=(SSL_CIPHER **)OBJ_bsearch((char *)&cp,
698                 (char *)sorted,
699                 SSL3_NUM_CIPHERS,sizeof(SSL_CIPHER *),
700                 (int (*)())ssl_cipher_ptr_id_cmp);
701         if ((cpp == NULL) || !(*cpp)->valid)
702                 return(NULL);
703         else
704                 return(*cpp);
705         }
706
707 int ssl3_put_cipher_by_char(c,p)
708 const SSL_CIPHER *c;
709 unsigned char *p;
710         {
711         long l;
712
713         if (p != NULL)
714                 {
715                 l=c->id;
716                 if ((l & 0xff000000) != 0x03000000) return(0);
717                 p[0]=((unsigned char)(l>> 8L))&0xFF;
718                 p[1]=((unsigned char)(l     ))&0xFF;
719                 }
720         return(2);
721         }
722
723 int ssl3_part_read(s,i)
724 SSL *s;
725 int i;
726         {
727         s->rwstate=SSL_READING;
728
729         if (i < 0)
730                 {
731                 return(i);
732                 }
733         else
734                 {
735                 s->init_num+=i;
736                 return(0);
737                 }
738         }
739
740 SSL_CIPHER *ssl3_choose_cipher(s,have,pref)
741 SSL *s;
742 STACK *have,*pref;
743         {
744         SSL_CIPHER *c,*ret=NULL;
745         int i,j,ok;
746         CERT *cert;
747         unsigned long alg,mask,emask;
748
749         /* Lets see which ciphers we can supported */
750         if (s->cert != NULL)
751                 cert=s->cert;
752         else
753                 cert=s->ctx->default_cert;
754
755         sk_set_cmp_func(pref,ssl_cipher_ptr_id_cmp);
756
757         for (i=0; i<sk_num(have); i++)
758                 {
759                 c=(SSL_CIPHER *)sk_value(have,i);
760
761                 ssl_set_cert_masks(cert,c);
762                 mask=cert->mask;
763                 emask=cert->export_mask;
764                         
765                 alg=c->algorithms&(SSL_MKEY_MASK|SSL_AUTH_MASK);
766                 if (SSL_IS_EXPORT(alg))
767                         {
768                         ok=((alg & emask) == alg)?1:0;
769 #ifdef CIPHER_DEBUG
770                         printf("%d:[%08lX:%08lX]%s\n",ok,alg,mask,c->name);
771 #endif
772                         }
773                 else
774                         {
775                         ok=((alg & mask) == alg)?1:0;
776 #ifdef CIPHER_DEBUG
777                         printf("%d:[%08lX:%08lX]%s\n",ok,alg,mask,c->name);
778 #endif
779                         }
780
781                 if (!ok) continue;
782         
783                 j=sk_find(pref,(char *)c);
784                 if (j >= 0)
785                         {
786                         ret=(SSL_CIPHER *)sk_value(pref,j);
787                         break;
788                         }
789                 }
790         return(ret);
791         }
792
793 int ssl3_get_req_cert_type(s,p)
794 SSL *s;
795 unsigned char *p;
796         {
797         int ret=0;
798         unsigned long alg;
799
800         alg=s->s3->tmp.new_cipher->algorithms;
801
802 #ifndef NO_DH
803         if (alg & (SSL_kDHr|SSL_kEDH))
804                 {
805 #  ifndef NO_RSA
806                 p[ret++]=SSL3_CT_RSA_FIXED_DH;
807 #  endif
808 #  ifndef NO_DSA
809                 p[ret++]=SSL3_CT_DSS_FIXED_DH;
810 #  endif
811                 }
812         if ((s->version == SSL3_VERSION) &&
813                 (alg & (SSL_kEDH|SSL_kDHd|SSL_kDHr)))
814                 {
815 #  ifndef NO_RSA
816                 p[ret++]=SSL3_CT_RSA_EPHEMERAL_DH;
817 #  endif
818 #  ifndef NO_DSA
819                 p[ret++]=SSL3_CT_DSS_EPHEMERAL_DH;
820 #  endif
821                 }
822 #endif /* !NO_DH */
823 #ifndef NO_RSA
824         p[ret++]=SSL3_CT_RSA_SIGN;
825 #endif
826 #ifndef NO_DSA
827         p[ret++]=SSL3_CT_DSS_SIGN;
828 #endif
829         return(ret);
830         }
831
832 int ssl3_shutdown(s)
833 SSL *s;
834         {
835
836         /* Don't do anything much if we have not done the handshake or
837          * we don't want to send messages :-) */
838         if ((s->quiet_shutdown) || (s->state == SSL_ST_BEFORE))
839                 {
840                 s->shutdown=(SSL_SENT_SHUTDOWN|SSL_RECEIVED_SHUTDOWN);
841                 return(1);
842                 }
843
844         if (!(s->shutdown & SSL_SENT_SHUTDOWN))
845                 {
846                 s->shutdown|=SSL_SENT_SHUTDOWN;
847 #if 1
848                 ssl3_send_alert(s,SSL3_AL_WARNING,SSL_AD_CLOSE_NOTIFY);
849 #endif
850                 /* our shutdown alert has been sent now, and if it still needs
851                  * to be written, s->s3->alert_dispatch will be true */
852                 }
853         else if (s->s3->alert_dispatch)
854                 {
855                 /* resend it if not sent */
856 #if 1
857                 ssl3_dispatch_alert(s);
858 #endif
859                 }
860         else if (!(s->shutdown & SSL_RECEIVED_SHUTDOWN))
861                 {
862                 /* If we are waiting for a close from our peer, we are closed */
863                 ssl3_read_bytes(s,0,NULL,0);
864                 }
865
866         if ((s->shutdown == (SSL_SENT_SHUTDOWN|SSL_RECEIVED_SHUTDOWN)) &&
867                 !s->s3->alert_dispatch)
868                 return(1);
869         else
870                 return(0);
871         }
872
873 int ssl3_write(s,buf,len)
874 SSL *s;
875 const char *buf;
876 int len;
877         {
878         int ret,n;
879
880 #if 0
881         if (s->shutdown & SSL_SEND_SHUTDOWN)
882                 {
883                 s->rwstate=SSL_NOTHING;
884                 return(0);
885                 }
886 #endif
887         clear_sys_error();
888         if (s->s3->renegotiate) ssl3_renegotiate_check(s);
889
890         /* This is an experimental flag that sends the
891          * last handshake message in the same packet as the first
892          * use data - used to see if it helps the TCP protocol during
893          * session-id reuse */
894         /* The second test is because the buffer may have been removed */
895         if ((s->s3->flags & SSL3_FLAGS_POP_BUFFER) && (s->wbio == s->bbio))
896                 {
897                 /* First time through, we write into the buffer */
898                 if (s->s3->delay_buf_pop_ret == 0)
899                         {
900                         ret=ssl3_write_bytes(s,SSL3_RT_APPLICATION_DATA,
901                                 (char *)buf,len);
902                         if (ret <= 0) return(ret);
903
904                         s->s3->delay_buf_pop_ret=ret;
905                         }
906
907                 s->rwstate=SSL_WRITING;
908                 n=BIO_flush(s->wbio);
909                 if (n <= 0) return(n);
910                 s->rwstate=SSL_NOTHING;
911
912                 /* We have flushed the buffer, so remove it */
913                 ssl_free_wbio_buffer(s);
914                 s->s3->flags&= ~SSL3_FLAGS_POP_BUFFER;
915
916                 ret=s->s3->delay_buf_pop_ret;
917                 s->s3->delay_buf_pop_ret=0;
918                 }
919         else
920                 {
921                 ret=ssl3_write_bytes(s,SSL3_RT_APPLICATION_DATA,
922                         (char *)buf,len);
923                 if (ret <= 0) return(ret);
924                 }
925
926         return(ret);
927         }
928
929 int ssl3_read(s,buf,len)
930 SSL *s;
931 char *buf;
932 int len;
933         {
934         int ret;
935         
936         clear_sys_error();
937         if (s->s3->renegotiate) ssl3_renegotiate_check(s);
938         s->s3->in_read_app_data=1;
939         ret=ssl3_read_bytes(s,SSL3_RT_APPLICATION_DATA,buf,len);
940         if ((ret == -1) && (s->s3->in_read_app_data == 0))
941                 {
942                 ERR_get_error(); /* clear the error */
943                 s->s3->in_read_app_data=0;
944                 s->in_handshake++;
945                 ret=ssl3_read_bytes(s,SSL3_RT_APPLICATION_DATA,buf,len);
946                 s->in_handshake--;
947                 }
948         else
949                 s->s3->in_read_app_data=0;
950
951         return(ret);
952         }
953
954 int ssl3_peek(s,buf,len)
955 SSL *s;
956 char *buf;
957 int len;
958         {
959         SSL3_RECORD *rr;
960         int n;
961
962         rr= &(s->s3->rrec);
963         if ((rr->length == 0) || (rr->type != SSL3_RT_APPLICATION_DATA))
964                 {
965                 n=ssl3_read(s,buf,1);
966                 if (n <= 0) return(n);
967                 rr->length++;
968                 rr->off--;
969                 }
970
971         if ((unsigned int)len > rr->length)
972                 n=rr->length;
973         else
974                 n=len;
975         memcpy(buf,&(rr->data[rr->off]),(unsigned int)n);
976         return(n);
977         }
978
979 int ssl3_renegotiate(s)
980 SSL *s;
981         {
982         if (s->handshake_func == NULL)
983                 return(1);
984
985         if (s->s3->flags & SSL3_FLAGS_NO_RENEGOTIATE_CIPHERS)
986                 return(0);
987
988         s->s3->renegotiate=1;
989         return(1);
990         }
991
992 int ssl3_renegotiate_check(s)
993 SSL *s;
994         {
995         int ret=0;
996
997         if (s->s3->renegotiate)
998                 {
999                 if (    (s->s3->rbuf.left == 0) &&
1000                         (s->s3->wbuf.left == 0) &&
1001                         !SSL_in_init(s))
1002                         {
1003 /*
1004 if we are the server, and we have sent a 'RENEGOTIATE' message, we
1005 need to go to SSL_ST_ACCEPT.\1e
1006 */
1007                         /* SSL_ST_ACCEPT */
1008                         s->state=SSL_ST_RENEGOTIATE;
1009                         s->s3->renegotiate=0;
1010                         s->s3->num_renegotiations++;
1011                         s->s3->total_renegotiations++;
1012                         ret=1;
1013                         }
1014                 }
1015         return(ret);
1016         }
1017